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EP1456819B1 - Verfahren und vorrichtungen für die überprüfung der echtheit von blattgut - Google Patents

Verfahren und vorrichtungen für die überprüfung der echtheit von blattgut Download PDF

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Publication number
EP1456819B1
EP1456819B1 EP02781343A EP02781343A EP1456819B1 EP 1456819 B1 EP1456819 B1 EP 1456819B1 EP 02781343 A EP02781343 A EP 02781343A EP 02781343 A EP02781343 A EP 02781343A EP 1456819 B1 EP1456819 B1 EP 1456819B1
Authority
EP
European Patent Office
Prior art keywords
light
sheet material
ultraviolet light
sensor
authenticity
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP02781343A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1456819A2 (de
Inventor
Lothar SCHÜTT
Hans-Uwe Richter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Giesecke and Devrient GmbH
Original Assignee
Giesecke and Devrient GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Giesecke and Devrient GmbH filed Critical Giesecke and Devrient GmbH
Publication of EP1456819A2 publication Critical patent/EP1456819A2/de
Application granted granted Critical
Publication of EP1456819B1 publication Critical patent/EP1456819B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/04—Payment circuits
    • G06Q20/042—Payment circuits characterized in that the payment protocol involves at least one cheque
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
    • G07D7/12—Visible light, infrared or ultraviolet radiation
    • G07D7/1205—Testing spectral properties
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
    • G07D7/12—Visible light, infrared or ultraviolet radiation
    • G07D7/121—Apparatus characterised by sensor details
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/20—Testing patterns thereon

Definitions

  • the present invention relates to methods and devices for checking the authenticity of sheet material, in particular banknotes, by means of ultraviolet light.
  • FR 2 801 125 A1 describes a variety of methods and devices based on reflection and transmission of light of different wavelengths. However, the document does not discourage the use of ultraviolet light to study the authenticity of banknotes because visible violet light behaves like ultraviolet light.
  • EP 0 668 576 A2 A device for recognizing the authenticity of banknotes is described in which ultraviolet radiation generated visible light is evaluated. In order to be able to compensate for the aging phenomena of a UV light source, a calibration is provided in which the amount of light generated by the UV light source is measured if there is no banknote to be checked.
  • the object of the present invention is therefore to specify a method and a device for checking the authenticity of sheet material, in particular banknotes, by means of ultraviolet light, with which a more reliable differentiation between forgeries and genuine banknotes is possible.
  • the invention is based on the fact that ultraviolet light is used to check the authenticity of sheet material, in particular banknotes, the transmitted, ie the ultraviolet light penetrating the sheet material to be checked, being used to check the authenticity.
  • the transmitted light that is the sheet to be inspected
  • another light is also used to verify the authenticity, including the transmitted ultraviolet light and the transmitted further light in a ratio be set to each other.
  • it is checked whether the ultraviolet light from the sheet material is converted into light of a different wavelength, wherein the wavelength of the further light is set so that they
  • Wavelength of the sheet material converted light corresponds to the other Wellenläge.
  • the advantage of the invention is to be seen in particular in that, in contrast to the methods and devices known from the prior art, the inspection can be carried out almost independently of contamination of the sheet material to be examined, since the effects arising from the pollution on the light passing through the sheet material are the same or in a defined relationship for both the ultraviolet light and the further light. If now the transmitted ultraviolet light and the transmitted further light are set in relation to each other, the pollution-related effects cancel each other out. By determining the wavelength of the additional light, the presence of brighteners can also be checked at the same time, for which purpose the second sensor can be used.
  • FIG. 1 a first embodiment of a device for checking the authenticity of sheet material, in particular banknotes, represented by means of ultraviolet light.
  • the sheet material is banknotes.
  • the banknotes BN are transported by a transport system, not shown, in a transport direction T past a sensor 20 and a light source 21. It is possible for the banknotes BN to be transported along their long side or along their short side.
  • the light source 21 generates light which is suitable for checking the authenticity of the banknotes BN and which lies in the ultraviolet range, ie has a wavelength below 400 nm.
  • the light source 21 may generate the ultraviolet light directly or a filter 23 may be provided which transmits only ultraviolet light.
  • the ultraviolet light penetrates the banknote BN at a position 15 which, with the transport of the banknote BN in the transporting direction T, sweeps over the entire length or width (depending on the selected mode of transport) of the banknote BN.
  • the transmitted ultraviolet light is detected by the sensor 20.
  • the sensor 20 may be sensitive only to the ultraviolet light generated by the light source 21, or it may be a filter 22 are provided, which transmits only corresponding ultraviolet light to the sensor 20.
  • the light source 21 for example, one or more UV light-emitting diodes can be used. It is also possible, for example, to use one or more fluorescent tubes which generate ultraviolet light.
  • further optical systems, such as lenses may be provided at the location of the filters 22 and 23 in order, for example, to achieve a special focusing at the location 15 or at the sensor 20.
  • the light source 21 emits ultraviolet light having a wavelength of less than 400 nm. Since, in the transmission of the ultraviolet light by the banknote BN, most of the ultraviolet light is absorbed in the material of the banknote BN, the measurement of the ultraviolet light transmitted by the banknote BN has hitherto not been used as a criterion for checking the authenticity of the banknote BN to use. However, it has been found that the evaluation of the transmitted ultraviolet light - just because of the large influence of the ultraviolet light when passing through the banknote BN, d. H. because of the large absorption occurring - a particularly good information about the material of each checked banknote BN and thus on their authenticity.
  • banknotes BN can be reliably distinguished from counterfeits if the amount of transmitted ultraviolet light detected by the sensor 20 is above a lower threshold and below an upper threshold. If the sensor 20 detects an amount of ultraviolet light higher than the upper threshold, there is a forgery of normal paper (wood), if the amount of ultraviolet light detected by the sensor 20 is below the lower threshold, a counterfeit of banknote paper (cotton) is present. in front.
  • an evaluation unit 10 with a connected memory 11 is provided.
  • the evaluation unit 10 can be formed for example by a microprocessor with connected memory 11, wherein the memory 11 may have a volatile and a non-volatile area. In the nonvolatile area of the memory 11, in particular, the mentioned threshold values are stored. So that the measurements originating from the sensor 20 can be processed by the evaluation unit 10, for example provided in the sensor 20, an analog / digital converter, which converts the analog output signal of the sensor 20 into a digital value.
  • the evaluation unit 10 compares the values originating from the sensor 20 with the threshold values and thus checks the authenticity of the banknote BN. Depending on the result of the check, the evaluation unit 10 identifies the banknote BN as genuine or as a counterfeit. This identifier can be used for the further processing of the banknote BN, z. For example, it is possible to control the transport system mentioned above, thereby making it possible to separate counterfeits from genuine banknotes. For this purpose, the counterfeits are transported, for example, in a special output tray.
  • an average value can be generated by the evaluation unit 10, which is compared with the threshold values. It is also possible to determine at least one pattern for the banknotes to be checked and to store them in the memory 11. In this case, the values generated while the bill BN is being fed past the sensor 20 are checked for conformity with the pattern to determine the authenticity of the bill BN. Another possibility is to only certain areas of the banknote BN, z. B. areas without printing, to examine and to compare with thresholds.
  • a further improvement of the authenticity check can be achieved if, on the side of the light source 21, a further sensor 30 is provided which can detect light in the visible range, ie. H. with a wavelength greater than 400 nm. Should the sensor 30 also be able to detect light with a smaller wavelength, a filter 32 can be provided which is not permeable to these light components. If there is a forgery containing optical brightener, the ultraviolet light of the light source 21 is converted to visible light by a fluorescence effect, which is detected by the sensor 30. So that the signal of the sensor 30 can be processed by the evaluation unit 10, the sensor 30 contains an analog / digital converter, which converts the sensor signal into a digital value. If the digital value exceeds a predetermined threshold value for the brightener measurement stored in the memory 11, a counterfeit is detected by the evaluation unit 10.
  • FIG. 2 is a second embodiment of an apparatus for checking the authenticity of sheet material, in particular banknotes, represented by means of ultraviolet light.
  • the second embodiment according to FIG. 2 is essentially like the first embodiment according to FIG. 1 built up.
  • the function of the device according to the second embodiment also substantially corresponds to the function of the device according to the first embodiment.
  • the device on the side of the ultraviolet light sensor 20, the device has a second light source 31 which generates light in a visible region, ie, with a wavelength greater than 400 nm. If the second light source 31 has shorter wavelength components, a filter 33 may be provided which will not let them pass.
  • the second sensor 30 which detects light in the visible range and is disposed on the side of the first ultraviolet light-generating light source 21, serves - as described - to detect the presence of optical brighteners.
  • the second sensor 30 is used to detect the transmitted light of the second visible light source 31. If there is a forgery involving optical brightener in the paper, the fluorescence effect will produce a relatively large amount of visible light so that the above-described threshold for brightener measurement is exceeded. If the fluorescence effect does not occur, only a significantly smaller amount of visible light is present, which is below the threshold value for the brightener measurement. This light comes from the second light source 31 and was transmitted through the banknote BN. From the second sensor 30, the corresponding values, which are digitized by an analog / digital converter, are sent to the evaluation unit 10 and set by the evaluation unit 10 in relation to the values of the first sensor 20, e.g. By dividing the values of the first sensor 20 by the values of the second sensor 30. Before the division of the values or instead of the division, a special correction of another mathematical relationship can be made, which results from the similar influence of the visible and the ultraviolet light results.
  • the first and second sensors 20 and 30 evaluate the banknote BN at the same location 15.
  • the wavelength of the second light source 31 is chosen such that the second sensor 30 already present for the detection of optical brighteners can be used for the detection of the transmitted light, for example such that the light is in the blue range.
  • the wavelength of the second light source 31 and the second sensor 30 may also be smaller than the wavelength of the first light source 21 and the first sensor 20. In this case, however, another sensor (not shown) must be provided on the side of the first light source 21 in order to check the presence of optical brighteners.
  • optical systems such as lenses may be provided to achieve, for example, a special focusing at the location 15 or the sensors.
  • the first light source 21 may, for. B. give light in a range of 350-400 nm, while the other light source 31 emits light in a range of 400-450 nm.
  • the sensors 20 and 30 and / or the filters 22, 23, 32, 33 may be adapted accordingly.
  • the device in a further preferred embodiment of the device according to the invention is a lock-in amplifier for amplifying output signals, before the analog / digital conversion, at least one of the sensors 20, 30 is provided.
  • Lock-in amplifiers are used in the measurement and processing of very weak analog signals, whereby the signal background is very strongly suppressed.
  • the modulated output signal of a sensor is amplified and demodulated with a normalized reference signal of the same modulation frequency in a synchronous demodulator.
  • the high-frequency components are then filtered out.
  • a signal proportional to the amplitude of the amplified emitted fluorescent light (sensor 30) and the reflected ultraviolet light (sensor 20) is obtained.
  • the present invention is particularly suitable for banknote processing machines, e.g. B. for sorting and / or counting machines and / or automatic teller machines.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Business, Economics & Management (AREA)
  • Strategic Management (AREA)
  • Accounting & Taxation (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Business, Economics & Management (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Credit Cards Or The Like (AREA)
EP02781343A 2001-12-10 2002-12-09 Verfahren und vorrichtungen für die überprüfung der echtheit von blattgut Expired - Lifetime EP1456819B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10160578A DE10160578A1 (de) 2001-12-10 2001-12-10 Verfahren und Vorrichtung für die Überprüfung der Echtheit von Blattgut
DE10160578 2001-12-10
PCT/EP2002/013941 WO2003054809A2 (de) 2001-12-10 2002-12-09 Verfahren und vorrichtungen für die überprüfung der echtheit von blattgut

Publications (2)

Publication Number Publication Date
EP1456819A2 EP1456819A2 (de) 2004-09-15
EP1456819B1 true EP1456819B1 (de) 2008-07-02

Family

ID=7708654

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02781343A Expired - Lifetime EP1456819B1 (de) 2001-12-10 2002-12-09 Verfahren und vorrichtungen für die überprüfung der echtheit von blattgut

Country Status (8)

Country Link
US (2) US7378665B2 (ru)
EP (1) EP1456819B1 (ru)
AT (1) ATE400041T1 (ru)
AU (1) AU2002349055A1 (ru)
DE (2) DE10160578A1 (ru)
ES (1) ES2306795T3 (ru)
RU (1) RU2301453C2 (ru)
WO (1) WO2003054809A2 (ru)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10346635A1 (de) * 2003-10-08 2005-05-12 Giesecke & Devrient Gmbh System zur Prüfung von Sicherheitsmerkmalen von Wertdokumenten
CN1950856B (zh) * 2004-03-08 2012-02-15 科学和工业研究理事会 使用积分透射和反射光谱响应的改进的验钞机
US7715613B2 (en) * 2006-09-08 2010-05-11 Mark Dobbs UV counterfeit currency detector
US7592608B2 (en) * 2008-01-22 2009-09-22 Honeywell International Inc. Apparatus and method for measuring and/or controlling ultraviolet-activated materials in a paper-making process
WO2010118160A1 (en) * 2009-04-08 2010-10-14 Mei, Inc. Characterizing items of currency
UY32945A (es) 2009-10-28 2011-05-31 Sicpa Holding Sa Validador de billetes
DE102010051087A1 (de) * 2010-11-12 2012-05-16 Beb Industrie-Elektronik Ag Verfahren und Vorrichtung zur Überprüfung der Echtheit von Banknoten mit Sicherheitsfenstern
DE102011110894A1 (de) * 2011-08-17 2013-02-21 Giesecke & Devrient Gmbh Sensor und Verfahren zum Betreiben des Sensors
US8987676B2 (en) * 2012-07-27 2015-03-24 Toshiba International Corporation System and method for the detection of soiling in bank notes
DE102013009222A1 (de) * 2013-05-31 2014-12-04 Giesecke & Devrient Gmbh Sicherheitssubstrat
DE102013010681A1 (de) 2013-06-26 2014-12-31 Giesecke & Devrient Gmbh Sicherheitssubstrat
JP2017107291A (ja) * 2015-12-07 2017-06-15 株式会社東芝 紙葉類検査装置および紙葉類処理装置
DE102020000968A1 (de) * 2020-02-14 2021-08-19 Giesecke+Devrient Currency Technology Gmbh Optischer Sensor zur Prüfung von Wertdokumenten
DE102021111189A1 (de) 2021-04-30 2022-11-03 Bundesdruckerei Gmbh Verfahren und Vorrichtung zur optischen Verifikation eines Bestandteils eines Ausweis-, Wert- oder Sicherheitsdokuments

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Also Published As

Publication number Publication date
ATE400041T1 (de) 2008-07-15
US7378665B2 (en) 2008-05-27
DE10160578A1 (de) 2004-02-12
RU2004121165A (ru) 2005-08-20
US20080185530A1 (en) 2008-08-07
AU2002349055A1 (en) 2003-07-09
ES2306795T3 (es) 2008-11-16
WO2003054809A3 (de) 2004-03-04
RU2301453C2 (ru) 2007-06-20
DE50212456D1 (de) 2008-08-14
US20050156116A1 (en) 2005-07-21
EP1456819A2 (de) 2004-09-15
US7550736B2 (en) 2009-06-23
WO2003054809A2 (de) 2003-07-03

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